Marine Weather Net

Straits of Florida from west end of Seven Mile Bridge to south of Halfmoon Shoal out 20 to 60 NM Marine Forecast


THIS AFTERNOON

E
WINDS
15
KNOTS

TONIGHT

E
WINDS
15
KNOTS

TUESDAY

E
WINDS
15
KNOTS

TUESDAY NIGHT

SSE
WINDS
10 - 15
KNOTS

The Marine Weather Forecast In Detail:
GMZ074 Forecast Issued: 1025 AM EST Mon Feb 24 2020

SMALL CRAFT SHOULD EXERCISE CAUTION UNTIL SEAS SUBSIDE
This Afternoon...East To Southeast Winds Near 15 Knots. Seas 4 To 6 Feet, Subsiding To 3 To 5 Feet.
Tonight...Southeast Winds Near 15 Knots. Seas 3 To 5 Feet.
Tuesday...Southeast Winds Near 15 Knots. Seas 3 To 5 Feet.
Tuesday Night...Southeast To South Winds 10 To 15 Knots. Seas 2 To 4 Feet. Isolated Showers.
Wednesday...Southwest Winds 10 To 15 Knots. Seas 2 To 3 Feet. Scattered Showers.
Wednesday Night...Northwest To North Winds 15 To 20 Knots. Seas Building To 4 To 5 Feet. Scattered Showers.
Thursday...Northwest To North Winds Near 20 Knots. Seas 4 To 6 Feet, Building To 5 To 7 Feet. Isolated Showers.
Thursday Night...North Winds 15 To 20 Knots. Seas 4 To 6 Feet.
Friday And Friday Night...North Winds Near 15 Knots. Seas 4 To 5 Feet.
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Synopsis for Keys coastal waters from Ocean Reef to Dry Tortugas: GMZ005
1025 AM EST Mon Feb 24 2020

Moderate to fresh east breezes across the coastal waters of the Florida Keys will diminish today, then become southeasterly by Tuesday. Southwesterly breezes Wednesday will shift to the northwest to north Wednesday night as the next cold front pushes through the Keys. Fresh northerly breezes are expected Thursday and Thursday night.

Gulf Stream
The Approximate Shoreward Edge of the Gulf Stream as of February 22...
- 13 NM South of Dry Tortugas Light...on Loggerhead Key.
- 14 NM South of Cosgrove Shoal Light...off the Marquesas Keys.
- 9 NM South of Sand Key Light...off Key West.
- 1 NM South of Looe Key...off Big Pine Key.
- 2 NM South of Sombrero Key Light...off Marathon.
- 4 NM Southeast of Alligator Reef Light...off Islamorada.
- 2 NM Southeast of Molasses Reef Light...off Key Largo.
- 2 NM East of Carysfort Reef Light...off Ocean Reef.
Area Forecast Discussion
National Weather Service Key West FL
1101am EST Monday Feb 24 2020

Currently - A surface high pressure system centered off the mid Atlantic coast extends southwestward across Florida and into the Gulf of Mexico. This is responsible for moderate east to southeast breezes across the Keys and surrounding waters. While there is near zonal flow aloft, we are at the base of a broad upper level ridge. Meanwhile, mid level ridging is in place across our area. This mornings sounding indicated substantial warm dry air aloft above a good inversion based around 850 mb. There is little lower level lift exhibited in both the sounding and on recent satellite imagery and the Cuban cloud line remains well offshore, also with no shower activity.

Short Term Update
Ridging will continue to dominate Keys weather through the afternoon. Winds will continue to clock more southeasterly oscillating about where they are speed wise. Expect temperatures to get up to around 80 degrees with the warmer flow and ample sunshine. Dew point temperatures will steadily climb towards the mid 60s today. Rain chances will remain zero due to the stable conditions, but patches of stratocumulus will occasionally invade northwestward across the island chain.

Marine
Expect winds to slowly veer more southeasterly this afternoon, remaining mostly moderate. A caution remains in place for the Florida Straits due to residual waves. Only minor transitional wording adjustments made in the morning marine update.

NOAA Key West FL Office: Watches - Warnings - Advisories
FL...None. GM...None.